Method of treating materials with liquid preservative.



H. S. LOUD. ATING MATERIALS WITH LIQUID PRESERVATIVE. 7 APPLICATION FILED JAN-11, I915- METH 0D 0F TRE Patented July 20,, 1915.

HENRY S. LOUD, OF NEW YORK, N. Y.

- METEOD F TREATING MATERIALS WITH LIQUID PRESERVATIVE.

' Specification of Letters Patent.

Patented July 2c, 1915.

Application filed'January 11, 1915. Serial No. 1,543.

To (ZZZ whom at may concern:

- Be itknown that I, HENRY S. Lom), a citizen of the United States, residing in the borough of Manhattan, city, county, and State of New York, have invented new and useful Improvements in Methods of Treating Materials with Liquid Preservativc, of which the following is a specification.

- My invention is an improvement in methods of impregnating wood and other porous bodies with preservative liquid under pressure, and consists in placing the body to of the article, and thus create a covering film be treated in a vessel and then hermetically sealing the vessel, and then forcing preservative liquid into the vessel in such manner as to continuously 'drench the surface or succession of films of liquid thereon,'and meanwhile to increase and vary the pressure of air contained in or introducedinto the vessel'upon said film, whereb'ycommingled preservative and air a are forced together under equal pressure into the pores, voids,

interstices and tissues of the article until the article is suffi'ciently impregnated or is eventually submerged in the accumulated,

liquid to secure additional impregnation.

lVhen the desired degree of pressure has been reached and the requisite amount of preservative forced into, and diffused through the article, the inflow of fluid is out off, and the pressure within the vessel reduced to, or below, atmosphericfor a period sufficient to allow the surplus liquid in the.

article to be ejected, usually not exceeding forty-five (45) minutes, and the accumulated liquid in the vessel withdrawn under such reduced pressure.

In the accompanying diagrammatic drawing is shown an apparatus adapted for carrying out my improved process, in which A represents a suitable horizontally disposed cylinder in which a railway tie 2 is inserted for treatment. Longitudinally disposed within the cylinder are spray pipes 3 and 4 supported, if necessary, by means of arms or brackets 5, one arranged above and the other below the tie, having jets or openings 6, for distributing the contents of the pipes over the surfaces of the tie.

7 is a feed pipe leading to the distributing pipes, and colmected by means of the valved pipe 8 with a source of preservative supply. 9 is an injector nozzle connected by the voughly drenching the same and creating valved pipe 10 with a source of compressed air supply.

11 is a vent -pipe, controlled by'the valve 12 to connect the bottom of the cylinder with vacuum producing means 13 in a pressure gage, and 14 is a safety valve or valvecontrolled air vent.

' 15 is a valved pipe connecting the bottom of the cylinder with the source of preservative supply. v

The manner inwhich the described apparatus carries out my improved process is as follows :The article to be treated, in this case a railway tie, is inserted into the cylinder which is then closed and hermetically sealed. The valve 12 being closed the preservative liquid is conveyed from its source of supply through the pipe 8 into the spray pipes 3 and 4, either under liquid pressure alone or with the additional pres sure of compressed air introduced through the injector 9, whereby the preservative is deliveredin a fine or atomized spray upon and against the surfaces of the tie thorthereover a film of flowing liquid. Meanwhile the air within and delivered into the cylinder is increasingly compressed whereby.

it forces preservative from this film into the 85 commingled with it. This penetration of pores and tissues of the tie ahead of,'and

the two fluids into the tie may be likened to successive minute pistons of liquid and air whereby the preservative is forced .deeply. into, and diffused throughout, the material. It is obvious that'in the carrying out of this process the degree of pressure, respective volumes of liquid and air forced into the tie, the length of time employed, &c. may be varied as desired according to the qualities of the material being treated or to meet other specific requirements. When the desired volume of commingled preservative and air has been forced into the tie under the requisite pressure the tie may be allowed 100 to be submerged by the accumulatin liquid and-such additional pressure applie thereto as may be required to secure the injection of a desired greater total amount of :liquid.

Thenthe inflow of fiuid'is cut off and the '105 valve 12 in the pipe 11 is opened to draw off the liquid and air under vacuum, thus completing the operation. Obviously the inflow of liquid as above set forth might submerge the tie before the requisite amount 110 Obviously, the amount and pressure of".

the accumulated air in the vessel may be regulated by means of the vent or safety valve 14.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. The method which consists in forcing into wood and other porous materials, commingled liquid and air.

2. The method which consists in covering a porous article with a flowing film of liquid, and surrounding such article with air under increasing pressure.

3. The method which consists in covering a porous article with a flowing film of liquid, surrounding such article with air under pressure, and then cutting off the inflow of liquid, reducingthe air pressure, and draw- 1ng off the surplus llquld under such reduced pressure.

4. The method which consists in drenching a porous article with liquid in the presence of air under progressively increasing ing pressure.

6. The method of impregnating a porous body with a liquid, which consists in commingling compressed air with the liquid asit is injected into the mass of the article.

7. Themethod of treating a porous body with a preservative liquid, which consists in injecting into the article a mixture of preservative liquid and compressed air, and

then reducing the pressure to permit the contained air to expand and expel the surplus liquid. 1

8. The method of impregnating wood and other porous material with a liquid, which consists in confining the article in a hermetically sealed vessel, then drenching the article with, the liquid to form a covering film, and meanwhile subjecting said film to increasing air pressure whereby the liquid of said film is forced into the pores, voids and interstices of the article in advance of, and commingled with, the air.

9. The method of impregnating wood and other porous material with a liquid, which consists in confining the article in a hermeti'cally sealed vessel, then drenching the article with the liquid to form a covering film, and meanwhile subjecting said film to increasing air pressure whereby the liquid of said film is forced into the pores, voids and interstices of the article in advance of, and commingled with, the air, then cutting off the inflow of fluid, then reducing said and other porous material with a liquid which consists in confining the article in a hermetically sealed vessel, then drenching the artlcle with the liquid to form a covering film and meanwhile subjecting said film to'increasing air pressure whereby the liquid of said film is forced into the pores, voids and interstices of the article in advance of, and commingled with, the air, and then gradually permitting the accumulated liquid to submerge the article and increasing the pressure.

11. The method of impregnating wood and other porous material with a liquid, which consists in confining the article in a hermetically sealed vessel, then drenching the article with the liquid to form a covering film, and meanwhile subjecting said film to increasing air pressure whereby the liquid of said film is forced into the pores, voids and interstices of the article in advance of,

and commingled with, the air, then gradually permitting the accumulated liquid to submerge the article and increasing the pressure, then cutting ofi' the inflow of fluid, and then reducing said pressure anddrawing ofi said liquid under such reduced pressure.

12. The method of impregnating wood with a liquid, which consists in forcing into the same under increasing air pressure, first minute portions of liquid, and then in succession under increasing pressure alternating minute portions of air and liquid, whereby the liquid is caused to penetrate the material in advance of, and commingled with, the air.

13. The method of impregnating wood with a liquid, which consists in first forcing a small amount of such liquid thereinto, andthen under gradually increasing pressure, alternating minute portions of air and liquid, whereby the liquid penetrates the material in advance of, and commingled with, the air and becomes diifused through the material, and then reducing such pressure and drawing ofi the liquid under such reduced pressure.

14:. The method of impregnating wood or other porous material with a liquid, which consists in confining the article in a hermetically sealed vessel, then continuously drenchconsists in confining the article in at hermetically sealed vessel, then continuously drenching the article with the liquid to form a flowing covering film, meanwhile subjecting said film to increasing air pressure and permitting the accumulating, liquid in the vessel to flow out of'the vessel to prevent submergence of the article until the desired amount of commingled air and liquid has been injected into the article, then shutting off the outflow of liquid from the cylinder to permit complete submergence of the article without increase of pressure, and then,increasing the pressure to the desired limit.

16. The method of impregnating Wood or other porous material with a liquid, Which consists in confining the article in a hermetically sealed vessel, then continuously drenching the article with the liquid to form a flowing covering film, meanwhile subject- Copies of this patent may be obtained for ing said film to increasing air pressure and permitting the accumulating liquid in the vessel to flow out of the vessel to prevent submergence of the article until the desired amount of commingled air and liquid has been injected into the article, then shutting off the outflow of liquid from the cylinder to permit complete submergence of the artiole without increase of pressure, then increasing the ressure to the desired limit, then cutting o the inflow of liquid, reducing the pressure, and drawing off the free liquid under such reduced pressure.

Signed at New York, county of New York, and State of New York, this 30th day of December, 1914.

I HENRY S. LOUD.

Witnesses:

-W. B. MORTON, T. D. Mnnwm.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

